CN102720434B - Polycrystal diamond hard alloy complex sheet matrix, composite sheet and preparation method thereof - Google Patents
Polycrystal diamond hard alloy complex sheet matrix, composite sheet and preparation method thereof Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 158
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 157
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 66
- 239000010432 diamond Substances 0.000 title claims abstract description 66
- 239000011159 matrix material Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000002131 composite material Substances 0.000 title abstract description 34
- 238000005245 sintering Methods 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 abstract description 16
- 238000005553 drilling Methods 0.000 abstract description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 16
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- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
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- 230000006872 improvement Effects 0.000 description 2
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- 238000003786 synthesis reaction Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a kind of polycrystal diamond hard alloy complex sheet matrix, comprising: carbide alloy cylinder; Be coated on the carbide alloy clad of described carbide alloy cylinder bottom surface and side, the cylindrical hardness of described carbide alloy is less than the hardness of carbide alloy clad.Compared with prior art, because the cylindrical hardness of carbide alloy is less than the hardness of carbide alloy clad, therefore, the outer hardness of this matrix is higher, abrasion resistance is better, and core toughness is better, impact strength is higher, thus it is better than existing composite sheet overall wear resistance, toughness is stronger, the longer service life of composite sheet, achieve cemented carbide body case hardness and intensity, the combination of toughness and abrasion resistance, improve overall wear resistance and the resistance to impact of composite polycrystal-diamond, extend probing cutter and cut the life-span, reduce drilling cost.
Description
Technical field
The present invention relates to polycrystal diamond hard alloy complex sheet technical field, more particularly, relate to a kind of polycrystal diamond hard alloy complex sheet matrix, composite sheet and preparation method thereof.
Background technology
Polycrystal diamond hard alloy complex sheet is made by polycrystalline diamond layer with as the carbide alloy pedestal of supporter by HTHP process.Wherein, polycrystalline diamond layer has the advantages that hardness is high, abrasion resistance is good, and carbide alloy then improves toughness and the solderability of composite sheet on the whole.This composite sheet is by a large amount of cutting teeth for making oil, natural gas, geological drill bit, the repeated action of fluctuating load will be subject in probing and rock drilling process, and because the effect impacted, rub makes the temperature of composite sheet material sharply change, its local temperature even can reach more than 1000 DEG C, to the performance of composite sheet and have an immense impact on application life.
Usually, the industry standard of evaluating combined piece performance quality often concentrates on these three macro-indicators of abrasion resistance, heat resistance and resistance to impact, existing research and development concentrates on the dimond synneusis layer of composite sheet mostly, then relative less with improvement to the performance evaluation of carbide alloy seat.As the important component part of composite sheet, the Structure and Properties feature of carbide alloy pedestal is in fact huge on the functional performance impact of whole composite sheet.Such as, when the hardness of carbide alloy pedestal and abrasion resistance less time, during probing, carbide alloy pedestal is probably preferentially worn, and accelerates the destruction of whole composite sheet; And when its hardness is higher, its fragility also corresponding increase while abrasion resistance increases, easily cause concussion fracture, once form micro-crack on surface, be easy to continue thermal shock impact and high frequency external impacts effect under, accelerate expansion and be deeply extended to carbide alloy inside, thus causing crackle expand and finally composite sheet ftractureed.When the impact strength of carbide alloy pedestal and toughness on the low side time, the strong and high-frequency percussion that continues when composite sheet may be unable to bear Drilling, and make the Defect expandings such as the micro-crack of composite sheet, intensification and cause scrapping of composite sheet; When its impact strength and toughness improve, its hardness and intensity can be restricted again, not wear-resistant.Therefore, be closely related for the stuctures and properties feature of the carbide alloy base material of polycrystal diamond hard alloy complex sheet and its hardness, intensity, abrasion resistance and toughness.
The carbide alloy pedestal overwhelming majority is homogeneous texture, be difficult to realize hardness, intensity, abrasion resistance and toughness closely between unification.Therefore, the appearance of Gradient Materials, the solution for the problems referred to above provide pole cleverly mentality of designing (Liu Yong, Yang Jiangao. gradient hard alloy material design. Changsha: publishing house of Central South University, 2010 .).For example, prior art adopts case-carbonizing, the method for nitriding improves the hardness of carbide alloy base-plates surface shallow-layer, improve the anti-wear performance on its surface, and core still has good toughness, thus on same material, realize combination and the coordination of abrasion resistance and impact resistance, hardness and intensity.
The preparation method at present with such Graded-structure Cemented Carbides material is a lot, but it seems from existing patent and bibliographical information, in the functionally graded design mostly just concentrating on Hardmetal materials simply and modification.And in fact, after selecting to do pedestal and the synthesis of diadust by superhigh-temperature and-pressure with the carbide alloy of this surperficial shallow-layer gradient distribution, due to catalyzer and cementing metal phase diffusive migration extremely fast, the gradient-structure formed probably is seriously damaged and is returned to the cemented carbide structure of homogeneous or nearly homogeneous, thus lose the combination of hardness and toughness, abrasion resistance and impact strength, affect the improvement of the comprehensive functional performance to composite sheet.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of the polycrystal diamond hard alloy complex sheet matrix, composite sheet and preparation method thereof with good hardness, toughness, abrasion resistance and impact strength simultaneously.
In order to solve above technical problem, the invention provides a kind of polycrystal diamond hard alloy complex sheet matrix, comprising:
Carbide alloy cylinder; Be coated on the carbide alloy clad of described carbide alloy cylinder bottom surface and side, the cylindrical hardness of described carbide alloy is less than the hardness of carbide alloy clad.
Preferably, described carbide alloy cylinder is radially formed and becomes large hardness gradient gradually from inside to outside.
Preferably, described carbide alloy cylinder comprises the first carbide alloy cylinder and is coated on the first hard alloy layer of described first carbide alloy cylindrical sides, the cylindrical hardness of described first carbide alloy is 86.1HRV, and the hardness of described first hard alloy layer is 87.3HRV.
Preferably, described carbide alloy clad comprises:
Be coated on the first carbide alloy clad of described carbide alloy cylinder bottom surface and side;
Be coated on the second carbide alloy clad outside described first carbide alloy clad,
The hardness of described first carbide alloy clad is 88.5HRV, and the hardness of described second carbide alloy clad is 89.2HRV.
Preferably, the ratio of the cross-sectional diameter of the cylindrical cross-sectional diameter of described carbide alloy and polycrystal diamond hard alloy complex sheet matrix is (0.75 ~ 0.9): 1.
Preferably, the aspect ratio of described carbide alloy cylinder and polycrystal diamond hard alloy complex sheet matrix is (0.5 ~ 0.9): 1.
Preferably, the cylindrical height of described carbide alloy is 4 ~ 8mm.
Accordingly, the present invention also provides a kind of polycrystal diamond hard alloy complex sheet, is made up of the polycrystal diamond hard alloy complex sheet matrix described in technique scheme and polycrystalline diamond layer.
The present invention also provides a kind of preparation method of polycrystal diamond hard alloy complex sheet, comprises the following steps:
By the polycrystal diamond hard alloy complex sheet matrix described in technique scheme and polycrystalline diamond layer at 1350 ~ 1650 DEG C, sinter under the condition of 5.0 ~ 8.5Gpa, obtain polycrystal diamond hard alloy complex sheet.
Preferably, the time of described sintering is 10 minutes.
The invention provides a kind of polycrystal diamond hard alloy complex sheet matrix, comprising: carbide alloy cylinder; Be coated on the carbide alloy clad of described carbide alloy cylinder bottom surface and side, the cylindrical hardness of described carbide alloy is less than the hardness of carbide alloy clad.Compared with prior art, because the cylindrical hardness of carbide alloy is less than the hardness of carbide alloy clad, therefore, the outer hardness of this matrix is higher, abrasion resistance is better, and core toughness is better, impact strength is higher, thus compared with existing composite sheet, there is abrasion resistance better, toughness is stronger, the feature of the longer service life of composite sheet, achieve cemented carbide body case hardness and intensity, the combination of toughness and abrasion resistance, improve overall wear resistance and the resistance to impact of composite polycrystal-diamond, extend probing cutter and cut the life-span, reduce drilling cost.
Accompanying drawing explanation
Fig. 1 is polycrystal diamond hard alloy complex sheet structural representation disclosed in the embodiment of the present invention;
Fig. 2 is polycrystal diamond hard alloy complex sheet sectional view disclosed in the embodiment of the present invention.
Detailed description of the invention
Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the invention discloses a kind of polycrystal diamond hard alloy complex sheet matrix, comprising: carbide alloy cylinder 1; Be coated on the carbide alloy clad 2 of carbide alloy cylinder bottom surface and side, the hardness of carbide alloy cylinder 1 is less than the hardness of carbide alloy clad 2.
In diamond hard alloy complex sheet matrix, the change of Co content can make the hardness of carbide alloy correspondingly change.
In embodiments of the present invention, preferably, described carbide alloy cylinder is radially formed and becomes large hardness gradient gradually from inside to outside, preferred, and carbide alloy is radially formed equidistantly or the hardness of unequal-interval becomes large change of gradient from inside to outside step by step.
Wherein, carbide alloy cylinder 1 preferably includes the first carbide alloy cylinder 11 and is coated on the first hard alloy layer 12 of the first carbide alloy cylinder 11 side, the hardness of the first carbide alloy cylinder 11 is 86.1HRV, and the hardness of the first hard alloy layer 12 is 87.3HRV.Carbide alloy clad 2 comprises: the first carbide alloy clad 21 being coated on carbide alloy cylinder 1 bottom surface and side, be coated on the second carbide alloy clad 22 outside the first carbide alloy clad 21, the hardness of the first carbide alloy clad 21 is 88.5HRV, and the hardness of the second carbide alloy clad 22 is 89.2HRV.Thus polycrystal diamond hard alloy complex sheet matrix forms four-layer structure, hardness is followed successively by from inside to outside: 86.1HRV, 87.3HRV, 88.5HRV and 89.2HRV.By the change of gradient of this hardness, ensure that the toughness of composite polycrystalline diamond composite sheet, the high rigidity of carbide alloy clad, ensure that the erosive wear resistance of alloy simultaneously, is applicable to the hard formation probing of high impact properties and high erosion.Wherein, the hard crystal grain in described carbide alloy cylinder and carbide alloy clad is respectively tungsten carbide.
As can be seen from such scheme, the outer hardness of composite sheet substrate provided by the invention is the highest, reduced gradually to core hardness by skin, can be applicable to the cutting tip of oil, natural gas, geological drill bit, the composite polycrystal-diamond made of this invention is better than existing composite sheet overall wear resistance, toughness is stronger, ensure that the erosive wear resistance of alloy, be applicable to the hard formation probing of high impact properties and high erosion.
In the present invention, the ratio of the cross-sectional diameter of the cylindrical cross-sectional diameter of carbide alloy and polycrystal diamond hard alloy complex sheet matrix is (0.75 ~ 0.9): 1, is more preferably (0.8 ~ 0.9): 1; The aspect ratio of described carbide alloy cylinder and polycrystal diamond hard alloy complex sheet matrix is (0.5 ~ 0.9): 1, is more preferably (0.6 ~ 0.8): 1.The cylindrical height of carbide alloy of the present invention is preferably 4 ~ 8mm, is more preferably 5 ~ 7mm.
Accordingly, the present invention also provides a kind of polycrystal diamond hard alloy complex sheet, as shown in Figure 1, is made up of the polycrystal diamond hard alloy complex sheet matrix described in technique scheme and polycrystalline diamond layer 3.
The bonding surface of polycrystal diamond hard alloy complex sheet matrix and polycrystalline diamond layer can be on-plane surface, is preferably wave groove, serrated slot, array side's platform, array bucking ladder, array cylinder or cone.In the case, the thickness of polycrystalline diamond layer can be 0.2 ~ 3.0mm, namely can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3.0mm.
Or the bonding surface between polycrystalline diamond layer and carbide alloy seat also can be plane.In the case, the thickness of polycrystalline diamond layer can be 0.2 ~ 1.2mm, namely can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm or 1.2mm.
Above-mentioned polycrystal diamond hard alloy complex sheet preferably adopts following preparation method, comprise the following steps: by the polycrystal diamond hard alloy complex sheet matrix described in technique scheme and polycrystalline diamond layer at 1350 ~ 1650 DEG C, sinter under the condition of 5.0 ~ 8.5Gpa, obtain polycrystal diamond hard alloy complex sheet.Wherein, sintering temperature is preferably 1400 ~ 1600 DEG C, is more preferably 1450 ~ 1550 DEG C; Sintering pressure is preferably 5.5 ~ 8Gpa, is more preferably 6 ~ 7Gpa; Sintering time is preferably 10 ~ 20 minutes, is more preferably 10 minutes.
In sum, the invention provides a kind of polycrystal diamond hard alloy complex sheet matrix, it has comparatively thick outer and hardness is higher, abrasion resistance is better, and core toughness better, double-deck diverse structure feature that impact strength is higher.When polycrystal diamond hard alloy complex sheet matrix is used for the HP-HT synthesize of composite polycrystal-diamond, even if still can preserve well through the synthesis of high pressure high temperature sintering and retain the gradient-structure feature designed in advance, thus produce the high-quality compact product that can simultaneously realize organically combining cemented carbide body case hardness and intensity, toughness and abrasion resistance, to improve overall wear resistance, the resistance to impact of composite polycrystal-diamond, and reach and extend probing cutter and cut the life-span and reduce the object such as drilling cost.
In order to further illustrate technical scheme of the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
Embodiment 1
Get carbide alloy pedestal, its diameter is 19mm, high 13mm, and it is 17mm that position 1 wherein comprises diameter, the concentric column region of autohemagglutination crystal layer interface 8mm down, adopts containing the Hardmetal materials of 16%Co as cementing agent; Position 2 adopts containing the Hardmetal materials of 13%Co as cementing agent, the formation of described carbide alloy pedestal is radially formed and becomes large hardness gradient gradually from inside to outside, polycrystal diamond hard alloy complex sheet matrix forms four-layer structure, and hardness is followed successively by from inside to outside: 86.1HRV, 87.3HRV, 88.5HRV and 89.2HRV;
After diadust is installed into block, upper cubic hinge press is at 1500oC, sinter 10 minutes under the condition of 5.5Gpa and be combined on carbide alloy pedestal, obtain the composite sheet that dimond synneusis layer 3 forms, the glomerocryst composite sheet Wear Resistance be made into like this and shock resistance improve all greatly, and application life obtains significant prolongation.
Detect the performance such as hardness and impact strength value of the carbide alloy pedestal that the present embodiment provides, result is as shown in table 1.
Embodiment 2
Get carbide alloy pedestal, its diameter is 13mm, high 8mm, it is 10mm that position 1 wherein comprises diameter, the concentric column region of autohemagglutination crystal layer interface 4mm down, position 1 wherein adopts containing the Hardmetal materials of 18%Co as cementing agent, and position 2 adopts containing the Hardmetal materials of 10%Co as cementing agent; The formation of described carbide alloy pedestal is radially formed and becomes large hardness gradient gradually from inside to outside, and polycrystal diamond hard alloy complex sheet matrix forms four-layer structure, and hardness is followed successively by from inside to outside: 86.1HRV, 87.3HRV, 88.5HRV and 89.2HRV.
After diadust is installed into block, upper cubic hinge press is at 1450 DEG C, sinter 12 minutes under the condition of 6.5Gpa and be combined on carbide alloy pedestal, obtain the composite sheet that dimond synneusis layer 3 forms, the glomerocryst composite sheet Wear Resistance be made into like this and shock resistance improve all greatly, and application life obtains significant prolongation.
Detect performances such as the hardness of the carbide alloy pedestal that the present embodiment provides and impact strength values, result is as shown in table 1, shows that the diamond hard alloy complex sheet matrix that the present embodiment provides is applicable to drill soft formation.
The carbide alloy pedestal results of property that table 1 embodiment 1 ~ 2 provides
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a polycrystal diamond hard alloy complex sheet, is made up of polycrystal diamond hard alloy complex sheet matrix and polycrystalline diamond layer;
Described polycrystal diamond hard alloy complex sheet matrix comprises:
Carbide alloy cylinder; Be coated on the carbide alloy clad of described carbide alloy cylinder bottom surface and side, the cylindrical hardness of described carbide alloy is less than the hardness of carbide alloy clad;
Described carbide alloy cylinder is radially formed and becomes large hardness gradient gradually from inside to outside.
2. polycrystal diamond hard alloy complex sheet according to claim 1, it is characterized in that, described carbide alloy cylinder comprises the first carbide alloy cylinder and is coated on the first hard alloy layer of described first carbide alloy cylindrical sides, the cylindrical hardness of described first carbide alloy is 86.1HRV, and the hardness of described first hard alloy layer is 87.3HRV.
3. polycrystal diamond hard alloy complex sheet according to claim 1, is characterized in that, described carbide alloy clad comprises:
Be coated on the first carbide alloy clad of described carbide alloy cylinder bottom surface and side;
Be coated on the second carbide alloy clad outside described first carbide alloy clad,
The hardness of described first carbide alloy clad is 88.5HRV, and the hardness of described second carbide alloy clad is 89.2HRV.
4. polycrystal diamond hard alloy complex sheet according to claim 1, it is characterized in that, the ratio of the cross-sectional diameter of the cylindrical cross-sectional diameter of described carbide alloy and polycrystal diamond hard alloy complex sheet matrix is (0.75 ~ 0.9): 1.
5. polycrystal diamond hard alloy complex sheet according to claim 1, is characterized in that, the aspect ratio of described carbide alloy cylinder and polycrystal diamond hard alloy complex sheet matrix is (0.5 ~ 0.9): 1.
6. polycrystal diamond hard alloy complex sheet according to claim 1, is characterized in that, the cylindrical height of described carbide alloy is 4 ~ 8mm.
7. a preparation method for polycrystal diamond hard alloy complex sheet, comprises the following steps:
By the polycrystal diamond hard alloy complex sheet matrix described in claim 1 ~ 6 any one and polycrystalline diamond layer at 1350 ~ 1650 DEG C, sinter under the condition of 5.0 ~ 8.5Gpa, obtain polycrystal diamond hard alloy complex sheet.
8. preparation method according to claim 7, is characterized in that, the time of described sintering is 10 minutes.
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| CN105156038B (en) * | 2015-08-27 | 2017-09-22 | 武汉钢铁有限公司 | Rock bit gradient composites carbide button and its processing method |
| CN106853532A (en) * | 2015-12-09 | 2017-06-16 | 自贡硬质合金有限责任公司 | Cermet and/or cemented carbide sintered body of a kind of composite construction and preparation method thereof |
| CN108057894B (en) * | 2017-12-12 | 2019-11-15 | 鑫京瑞钨钢（厦门）有限公司 | A kind of gradient hard alloy pole |
| CN109322666A (en) * | 2018-12-11 | 2019-02-12 | 吉林大学 | A kind of sandwiched gradient distribution diadust strengthened pick |
| CN109681530A (en) * | 2019-02-28 | 2019-04-26 | 桂林星钻超硬材料有限公司 | A kind of rolling bearing |
| CN110919004B (en) * | 2019-12-04 | 2022-04-01 | 武汉玖石超硬材料有限公司 | High impact toughness polycrystalline diamond hard alloy composite sheet and manufacturing method thereof |
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| US4743515A (en) * | 1984-11-13 | 1988-05-10 | Santrade Limited | Cemented carbide body used preferably for rock drilling and mineral cutting |
| CN1049392A (en) * | 1989-08-08 | 1991-02-20 | 林中 | The drill bit of diamond composite and made |
| CN1668417A (en) * | 2002-07-23 | 2005-09-14 | 彗星集团控股有限公司 | Machine tool with a tool shank and a cutting head |
| CN2906032Y (en) * | 2005-11-24 | 2007-05-30 | 江汉石油钻头股份有限公司 | Polycrystalline diamond composite sheet with granular gradient |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4743515A (en) * | 1984-11-13 | 1988-05-10 | Santrade Limited | Cemented carbide body used preferably for rock drilling and mineral cutting |
| CN1049392A (en) * | 1989-08-08 | 1991-02-20 | 林中 | The drill bit of diamond composite and made |
| CN1668417A (en) * | 2002-07-23 | 2005-09-14 | 彗星集团控股有限公司 | Machine tool with a tool shank and a cutting head |
| CN2906032Y (en) * | 2005-11-24 | 2007-05-30 | 江汉石油钻头股份有限公司 | Polycrystalline diamond composite sheet with granular gradient |
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Address after: 475200, Zhongxing Road, North City, Zhengzhou, Henan, Xinzheng Patentee after: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. Address before: 475200, Zhongxing Road, North City, Zhengzhou, Henan, Xinzheng Patentee before: Henan Jingrui Superhard Material Co., Ltd. |
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Address after: 451162 Henan airport, Zhengzhou, west side of Xingang Avenue Patentee after: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. Address before: 475200, Zhongxing Road, North City, Zhengzhou, Henan, Xinzheng Patentee before: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. |
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Denomination of invention: Polycrystalline diamond hard alloy composite sheet substrate, composite and preparation method Effective date of registration: 20161216 Granted publication date: 20150909 Pledgee: Bank of China Limited by Share Ltd Xinzheng branch Pledgor: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. Registration number: 2016990001118 |
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Date of cancellation: 20180223 Granted publication date: 20150909 Pledgee: Bank of China Limited by Share Ltd Xinzheng branch Pledgor: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. Registration number: 2016990001118 |